nRF9160 DK FW V1.3.2: Connect the AT command serial port of the DK board with the STM32 serial port

[Alex Liao]

Hello,

I use the nrf9160 development board as the modem to connect to the cloud, but the MCU uses STM32.

STM32 uses the AT command to connect the nrf9160 DK.

nrf9160 DK FW version: mfw_nrf9160_1.3.2.

nrf9160 DK can communicate AT commands with PC through USB interface.

But using Arduino interface and STM32 cannot communicate with AT command.

nrf9160 DK AT UART interface pin:  tx (P0.22) , rx (P0.23) ,rts (P0.24), cts (P0.25)

Is the AT UART pin of nrf9160 DK correct? 

Thank you and  Best Regards

[dejans]

Hi,

Based on the nRF9160 DK board control, it seems that you should be able to use mentioned pins. Could you send your overlay or dts file?

Best regards,
Dejan

[Alex Liao]

Hi Dejan, 

Thank you for your support.

I do not modify the firmware of NRF9160 DK, but use it directly to communicate. 

The problem has been found, turn the IFMCU DISCONN switch(SW6) to the right position. And NRF9160 DK AT command UART pins is:  tx (P0.29) , rx (P0.28) ,rts (P0.27), cts (P0.26).

Thanks & Best regards,

Alex

[dejans]

Hi Alex,

Thank you for letting me know that the issue has been resolved.

Best regards,
Dejan